<?php
/*********************/
/*                   */
/* http://www.ymd.cc */
/*********************/
/*    QQ: 11121426   */
/*                   */
/*********************/

function compile_section_start($arguments, &$object)
{
    $attrs = $object->_parse_arguments($arguments);
    $arg_list = array();
    $output = "<?php ";
    $section_name = $attrs['name'];
    if (empty($section_name)) {
        $object->trigger_error("missing section name", E_USER_ERROR, __FILE__, 18);
    }
    $output .= "if (isset(\$this->_sections['{$section_name}'])) unset(\$this->_sections['{$section_name}']);\n";
    $section_props = "\$this->_sections['{$section_name}']";
    foreach ($attrs as $attr_name => $attr_value) {
        switch ($attr_name) {
            case "loop" :
                $output .= "{$section_props}['loop'] = is_array({$attr_value}) ? count({$attr_value}) : max(0, (int){$attr_value});\n";
                break;
            case "show" :
                if (is_bool($attr_value)) {
                    $show_attr_value = $attr_value ? "true" : "false";
                } else {
                    $show_attr_value = "(bool){$attr_value}";
                }
                $output .= "{$section_props}['show'] = {$show_attr_value};\n";
                break;
            case "name" :
                $output .= "{$section_props}['{$attr_name}'] = '{$attr_value}';\n";
                break;
            case "max" :
            case "start" :
                $output .= "{$section_props}['{$attr_name}'] = (int){$attr_value};\n";
                break;
            case "step" :
                $output .= "{$section_props}['{$attr_name}'] = ((int){$attr_value}) == 0 ? 1 : (int){$attr_value};\n";
                break;
            default :
                $object->trigger_error("unknown section attribute - '{$attr_name}'", E_USER_ERROR, __FILE__, 58);
                break;
        }
    }
    if (!isset($attrs['show'])) {
        $output .= "{$section_props}['show'] = true;\n";
    }
    if (!isset($attrs['loop'])) {
        $output .= "{$section_props}['loop'] = 1;\n";
    }
    if (!isset($attrs['max'])) {
        $output .= "{$section_props}['max'] = {$section_props}['loop'];\n";
    } else {
        $output .= "if ({$section_props}['max'] < 0)\n" . "    {$section_props}['max'] = {$section_props}['loop'];\n";
    }
    if (!isset($attrs['step'])) {
        $output .= "{$section_props}['step'] = 1;\n";
    }
    if (!isset($attrs['start'])) {
        $output .= "{$section_props}['start'] = {$section_props}['step'] > 0 ? 0 : {$section_props}['loop']-1;\n";
    } else {
        $output .= "if ({$section_props}['start'] < 0)\n" . "    {$section_props}['start'] = max({$section_props}['step'] > 0 ? 0 : -1, {$section_props}['loop'] + {$section_props}['start']);\n" . "else\n" . "    {$section_props}['start'] = min({$section_props}['start'], {$section_props}['step'] > 0 ? {$section_props}['loop'] : {$section_props}['loop']-1);\n";
    }
    $output .= "if ({$section_props}['show']) {\n";
    if (!isset($attrs['start']) && !isset($attrs['step']) && !isset($attrs['max'])) {
        $output .= "    {$section_props}['total'] = {$section_props}['loop'];\n";
    } else {
        $output .= "    {$section_props}['total'] = min(ceil(({$section_props}['step'] > 0 ? {$section_props}['loop'] - {$section_props}['start'] : {$section_props}['start']+1)/abs({$section_props}['step'])), {$section_props}['max']);\n";
    }
    $output .= "    if ({$section_props}['total'] == 0)\n" . "        {$section_props}['show'] = false;\n" . "} else\n" . "    {$section_props}['total'] = 0;\n";
    $output .= "if ({$section_props}['show']){\n";
    $output .= "\r\n        for ({$section_props}['index'] = {$section_props}['start'], {$section_props}['iteration'] = 1;\r\n             {$section_props}['iteration'] <= {$section_props}['total'];\r\n             {$section_props}['index'] += {$section_props}['step'], {$section_props}['iteration']++){\n";
    $output .= "{$section_props}['rownum'] = {$section_props}['iteration'];\n";
    $output .= "{$section_props}['index_prev'] = {$section_props}['index'] - {$section_props}['step'];\n";
    $output .= "{$section_props}['index_next'] = {$section_props}['index'] + {$section_props}['step'];\n";
    $output .= "{$section_props}['first']      = ({$section_props}['iteration'] == 1);\n";
    $output .= "{$section_props}['last']       = ({$section_props}['iteration'] == {$section_props}['total']);\n";
    $output .= "?>";
    return $output;
}

?>
